package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author lenovo
 * @description TODO
 * @date 2022/9/26 11:23
 */

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private DishService dishService;

    @Autowired
    private CategoryService categoryService;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {

        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");


    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        Page<Dish> pageInfo = new Page<>(page, pageSize);

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.like(name != null, Dish::getName, name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo, queryWrapper);

        //分析: 上述查询的分页对象中, List<Dish> 数据中, 每一个Dish对象, 没有分类名称
        //2. 创建新的分页对象
        Page<DishDto> dishDtoPage = new Page<>();

        //3. 进行对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        //4. 获取基本分页查询的集合数据
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> dtoList = new ArrayList<>();

        //5 遍历菜品集合
        for (Dish dish : records) {
            //5.1 将Dish拷贝到DishDto
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(dish, dishDto);
            //5.2 查询每一个菜品所属分类名称
            Category c = categoryService.getById(dish.getCategoryId());
            dishDto.setCategoryName(c.getName());
            //5.3 放入集合中
            dtoList.add(dishDto);
        }
        //6. 将dtoList集合, 添加到dtoPage分页对象中
        dishDtoPage.setRecords(dtoList);
        //7. 返回分页对象数据
        return R.success(dishDtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getIdWithFlavor(id);
        return R.success(dishDto);

    }

    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        return R.success("修改菜品成功");
    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        List<DishDto> dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        return R.success(dishDtoList);
    }

}
